ALMAMOURY, Qusay A. Ultra-Efficient Hybrid Propulsion System Integrating Stirling Engines and PEM Fuel Cells: Thermodynamic Feasibility and Techno-Economic Assessment. Vital Annex: International Journal of Novel Research in Advanced Sciences (2751-756X), [S. l.], v. 5, n. 3, p. 159–165, 2026. Disponível em: https://journals.innoscie.com/index.php/ijnras/article/view/381. Acesso em: 30 sep. 2026.